Add asADash entry point into SkPathEffect to allow extracting Dash info from PathEffects
BUG=skia:
R=bsalomon@google.com, reed@google.com
Author: egdaniel@google.com
Review URL: https://codereview.chromium.org/212103010
git-svn-id: http://skia.googlecode.com/svn/trunk@14297 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/AsADashTest.cpp b/tests/AsADashTest.cpp
new file mode 100644
index 0000000..47f1971
--- /dev/null
+++ b/tests/AsADashTest.cpp
@@ -0,0 +1,57 @@
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "Test.h"
+
+#include "SkPathEffect.h"
+#include "SkDashPathEffect.h"
+#include "SkCornerPathEffect.h"
+
+DEF_TEST(AsADashTest_noneDash, reporter) {
+ SkAutoTUnref<SkCornerPathEffect> pe(SkCornerPathEffect::Create(1.0));
+ SkPathEffect::DashInfo info;
+
+ SkPathEffect::DashType dashType = pe->asADash(&info);
+ REPORTER_ASSERT(reporter, SkPathEffect::kNone_DashType == dashType);
+}
+
+DEF_TEST(AsADashTest_nullInfo, reporter) {
+ SkScalar inIntervals[] = { 4.0, 2.0, 1.0, 3.0 };
+ const SkScalar phase = 2.0;
+ SkAutoTUnref<SkDashPathEffect> pe(SkDashPathEffect::Create(inIntervals, 4, phase));
+
+ SkPathEffect::DashType dashType = pe->asADash(NULL);
+ REPORTER_ASSERT(reporter, SkPathEffect::kDash_DashType == dashType);
+}
+
+DEF_TEST(AsADashTest_usingDash, reporter) {
+ SkScalar inIntervals[] = { 4.0, 2.0, 1.0, 3.0 };
+ SkScalar totalIntSum = 10.0;
+ const SkScalar phase = 2.0;
+
+ SkAutoTUnref<SkDashPathEffect> pe(SkDashPathEffect::Create(inIntervals, 4, phase));
+
+ SkPathEffect::DashInfo info;
+
+ SkPathEffect::DashType dashType = pe->asADash(&info);
+ REPORTER_ASSERT(reporter, SkPathEffect::kDash_DashType == dashType);
+ REPORTER_ASSERT(reporter, 4 == info.fCount);
+ REPORTER_ASSERT(reporter, SkScalarMod(phase, totalIntSum) == info.fPhase);
+
+ // Since it is a kDash_DashType, allocate space for the intervals and recall asADash
+ SkAutoTArray<SkScalar> intervals(info.fCount);
+ info.fIntervals = intervals.get();
+ pe->asADash(&info);
+ REPORTER_ASSERT(reporter, inIntervals[0] == info.fIntervals[0]);
+ REPORTER_ASSERT(reporter, inIntervals[1] == info.fIntervals[1]);
+ REPORTER_ASSERT(reporter, inIntervals[2] == info.fIntervals[2]);
+ REPORTER_ASSERT(reporter, inIntervals[3] == info.fIntervals[3]);
+
+ // Make sure nothing else has changed on us
+ REPORTER_ASSERT(reporter, 4 == info.fCount);
+ REPORTER_ASSERT(reporter, SkScalarMod(phase, totalIntSum) == info.fPhase);
+}